... : 5W Frequency range: 200Hz-20kHz Loudspeaker Unit: 50mm mini bluetooth speaker Input:DC5V 1000mA Rate power: 5W Impedance: 90Ω Color: black ... -20kHz Loudspeaker Unit: 50mm1.pairs with most Bluetooth Devices 2.Bluetooth 2.1+ERD with supported profiles(A20P,AVRCP) 3.Charging through USB ... of PC,iphone,ipad,MP3,MP4, mobile phones. mini bluetooth speaker